.tree-diagram ul {
    display: flex;
    position: relative;

    /* Reset */
    list-style-type: none;
    margin: 0;
    padding: 1rem 0.5rem 0rem 0.5rem;
}

.tree-diagram ul ul::before {
    border-right: 1px solid rgba(0, 0, 0, 0.3);
    content: '';
    height: 1rem;
    position: absolute;
    top: 0;
    right: 50%;
    width: 50%;
}

.tree-diagram li {
    padding: 1rem 0.5rem 0rem 0.5rem;
    position: relative;

    /* Center the content */
    align-items: center;
    display: flex;
    flex-direction: column;
}

.tree-diagram li::before {
    border-right: 1px solid rgba(0, 0, 0, 0.3);
    border-top: 1px solid rgba(0, 0, 0, 0.3);
    content: '';
    height: 1rem;

    /* Position */
    position: absolute;
    top: 0;
    right: 50%;
    width: 50%;
}

.tree-diagram li::after {
    border-top: 1px solid rgba(0, 0, 0, 0.3);
    content: '';

    /* Position */
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
}

.tree-diagram li:first-child::before,
.tree-diagram li:last-child::after {
    border-top: none;
}

li.tree-diagram__root::before {
    border-right: none;
}
